Resolve "ILIAS-Schnittstelle: Inkompatibilität mit ILIAS 9"

Closes #4995

Merge request studip/studip!3888

15 files changed, 327 insertions, 131 deletions

diff --git a/app/controllers/admin/ilias_interface.php b/app/controllers/admin/ilias_interface.php
index 37b1664..c327c29 100644
--- a/app/controllers/admin/ilias_interface.php
+++ b/app/controllers/admin/ilias_interface.php
@@ -124,7 +124,7 @@ class Admin_IliasInterfaceController extends AuthenticatedController
         $this->valid_url = false;
         $this->ilias_version = '';
         $this->ilias_version_date = '';
-        $this->clients = [];
+        $this->ilias_clients = [];
         if ($index === 'new') {
             // default values
             $this->ilias_config = [
@@ -170,7 +170,7 @@ class Admin_IliasInterfaceController extends AuthenticatedController
             // get ILIAS server info
             if (Request::get('ilias_url')) {
                 $info = ConnectedIlias::getIliasInfo(Request::get('ilias_url'));
-                if (count($info)) {
+                if (is_array($info) && count($info)) {
                     $this->valid_url = true;
                     $this->ilias_config['url'] = Request::get('ilias_url');
                     $this->ilias_config['http_connection_timeout'] = (int) Request::get('ilias_http_connection_timeout');
@@ -247,8 +247,18 @@ class Admin_IliasInterfaceController extends AuthenticatedController
      */
     public function edit_content_action($index)
     {
-        $this->ilias_config = $this->ilias_configs[$index];
         $this->ilias_index = $index;
+        $this->ilias_datafields = [];
+
+        $connected_ilias = new ConnectedIlias($index);
+        $this->ilias_config = $connected_ilias->ilias_config;
+
+        if ($admin_id = $connected_ilias->soap_client->lookupUser($this->ilias_config['admin'])) {
+            $user = $connected_ilias->soap_client->getUser($admin_id);
+            if (!empty($user) && array_key_exists('udfs', $user)) {
+                $this->ilias_datafields = $user['udfs'];
+            }
+        }
     }
 
     /**
@@ -257,8 +267,11 @@ class Admin_IliasInterfaceController extends AuthenticatedController
      */
     public function edit_permissions_action($index)
     {
-        $this->ilias_config = $this->ilias_configs[$index];
         $this->ilias_index = $index;
+
+        $connected_ilias = new ConnectedIlias($index);
+        $this->ilias_config = $connected_ilias->ilias_config;
+        $this->global_roles = $connected_ilias->soap_client->getRoles('global', -1);
     }
 
     /**
@@ -420,28 +433,31 @@ class Admin_IliasInterfaceController extends AuthenticatedController
      */
     public function soap_methods_action($index)
     {
-        if ($this->ilias_configs[$index]['is_active']) {
-            $ilias = new ConnectedIlias($index);
-            $this->soap_methods = $ilias->getSoapMethods();
-            ksort($this->soap_methods);
-            $this->ilias_index = $index;
-            if (Request::get('ilias_soap_method')) {
-                $this->ilias_soap_method = Request::get('ilias_soap_method');
-                foreach ($this->soap_methods[Request::get('ilias_soap_method')] as $param) {
-                    switch ($param) {
-                        case "sid" : $this->params[$param] = $ilias->soap_client->getSID();
-                        break;
-                        case "user_id" : $this->params[$param] = $ilias->user->getId();
-                        break;
-                    }
+        $ilias = new ConnectedIlias($index);
+
+        $this->soap_methods = $ilias->getSoapMethods();
+        ksort($this->soap_methods);
+        $this->ilias_index = $index;
+        if (Request::get('ilias_soap_method')) {
+            $this->ilias_soap_method = Request::get('ilias_soap_method');
+            foreach ($this->soap_methods[Request::get('ilias_soap_method')] as $param) {
+                switch ($param) {
+                    case "sid" : $this->params[$param] = $ilias->soap_client->getSID();
+                    break;
+                    case "user_id" : $this->params[$param] = is_object($ilias->user) ? $ilias->user->getId() : '';
+                    break;
                 }
-            } elseif (Request::get('ilias_call')) {
-                $params = [];
-                foreach ($this->soap_methods[Request::get('ilias_call')] as $param) {
+            }
+        } elseif (Request::get('ilias_call')) {
+            $params = [];
+            foreach ($this->soap_methods[Request::get('ilias_call')] as $param) {
+                if ($param === 'user_ids') {
+                    $params[$param] = [Request::get('ilias_soap_param_'.$param)];
+                } else {
                     $params[$param] = Request::get('ilias_soap_param_'.$param);
                 }
-                $this->result = $ilias->soap_client->call(Request::get('ilias_call'), $params);
             }
+            $this->result = $ilias->soap_client->call(Request::get('ilias_call'), $params);
         }
     }
 }
diff --git a/app/controllers/course/ilias_interface.php b/app/controllers/course/ilias_interface.php
index 96196da..ee34048 100644
--- a/app/controllers/course/ilias_interface.php
+++ b/app/controllers/course/ilias_interface.php
@@ -26,9 +26,8 @@ class Course_IliasInterfaceController extends AuthenticatedController
     {
         parent::before_filter($action, $args);
 
-        if (Request::isXhr()) {
-            $this->dialog = true;
-        }
+        $this->dialog = Request::isXhr();
+
         if (!Config::Get()->ILIAS_INTERFACE_ENABLE ) {
             throw new AccessDeniedException(_('ILIAS-Interface ist nicht aktiviert.'));
         } else
@@ -173,7 +172,7 @@ class Course_IliasInterfaceController extends AuthenticatedController
                     Icon::create('group2')
                 )->asDialog('size=auto');
             }
-            if ($this->author_permission) {
+            if ($this->author_permission && !empty($this->ilias_interface_config['show_tools_page'])) {
                 $widget->addLink(
                     _('Externe Accounts verwalten'),
                     $this->url_for('my_ilias_accounts'),
@@ -380,7 +379,7 @@ class Course_IliasInterfaceController extends AuthenticatedController
             }
             // exclude all modules that are already assigned to course
             foreach ($this->ilias_modules as $module_id => $module) {
-                if ($course_modules[$this->ilias_index][$module_id]) {
+                if (!empty($course_modules[$this->ilias_index][$module_id])) {
                     unset($this->ilias_modules[$module_id]);
                 }
             }
diff --git a/app/controllers/my_ilias_accounts.php b/app/controllers/my_ilias_accounts.php
index fc4c00d..01ce191 100644
--- a/app/controllers/my_ilias_accounts.php
+++ b/app/controllers/my_ilias_accounts.php
@@ -217,8 +217,7 @@ class MyIliasAccountsController extends AuthenticatedController
                     }
 
                     // refer to ILIAS target file
-                    header('Location: '. $this->ilias->getTargetFile() . $parameters);
-                    $this->render_nothing();
+                    $this->redirect($this->ilias->getTargetFile() . $parameters);
                 }
             }
         }
diff --git a/app/views/admin/ilias_interface/edit_content.php b/app/views/admin/ilias_interface/edit_content.php
index ce48668..a45c5fc 100644
--- a/app/views/admin/ilias_interface/edit_content.php
+++ b/app/views/admin/ilias_interface/edit_content.php
@@ -11,43 +11,43 @@
     <input type="hidden" name="ilias_content_settings" size="50" maxlength="255" value="1">
     <label>
         <span class="required"><?= _('Wurzelkategorie für Stud.IP-Daten') ?></span>
-        <? if ($ilias_config['root_category']) : ?>
+        <? if (!empty($ilias_config['root_category'])) : ?>
             <div><?=htmlReady($ilias_config['root_category_name']).' (ID '.htmlReady($ilias_config['root_category']).')'?></div>
         <? else : ?>
-            <input type="text" name="ilias_root_category_name" size="50" maxlength="255" value="<?= htmlReady($ilias_config['root_category_name']) ?>" required>
+            <input type="text" name="ilias_root_category_name" size="50" maxlength="255" value="<?= empty($ilias_config['root_category_name']) ? '' : htmlReady($ilias_config['root_category_name']) ?>" required>
         <? endif ?>
     </label>
-    <? if ($ilias_config['user_data_category']) : ?>
+    <? if (!empty($ilias_config['user_data_category'])) : ?>
     <label>
         <span class="required"><?= _('Kategorie mit User-Daten') ?></span>
         <div><?= _('User_daten').' (ID '.htmlReady($ilias_config['user_data_category']).')'?></div>
     </label>
     <? endif ?>
     <label>
-        <input type="checkbox" name="ilias_category_create_on_add_module" value="1" <?= $ilias_config['category_create_on_add_module'] ? 'checked' : '' ?>>
+        <input type="checkbox" name="ilias_category_create_on_add_module" value="1" <?= !empty($ilias_config['category_create_on_add_module']) ? 'checked' : '' ?>>
         <span><?= _('Persönliche ILIAS-Kategorie erst erzeugen, wenn Lernobjekte angelegt werden') ?></span>
     </label>
     <? if (array_key_exists('version', $ilias_config) && (ConnectedIlias::getIntVersion($ilias_config['version']) >= 50400) && (ConnectedIlias::getIntVersion($ilias_config['version']) < 60000)) : ?>
         <label>
-            <input type="checkbox" name="ilias_category_to_desktop" value="1" <?= $ilias_config['category_to_desktop'] ? 'checked' : '' ?>>
+            <input type="checkbox" name="ilias_category_to_desktop" value="1" <?= !empty($ilias_config['category_to_desktop']) ? 'checked' : '' ?>>
             <span><?= _('Persönliche ILIAS-Kategorie auf den Schreibtisch legen') ?></span>
         </label>
     <? endif ?>
     <label>
-        <input type="checkbox" name="ilias_delete_ilias_users" value="1" <?= $ilias_config['delete_ilias_users'] ? 'checked' : '' ?>>
+        <input type="checkbox" name="ilias_delete_ilias_users" value="1" <?= !empty($ilias_config['delete_ilias_users']) ? 'checked' : '' ?>>
         <span><?= _('Beim Löschen von Stud.IP-Accounts ILIAS-Accounts ebenfalls löschen (alle zugehörigen Objekte werden gelöscht!)') ?></span>
     </label>
     <label>
         <span><?= _('Prefix für automatisch angelegte Usernamen') ?></span>
         <? if ($ilias_config['is_active']) : ?>
-            <div><?=$ilias_config['user_prefix'] ? htmlReady($ilias_config['user_prefix']) : _('Kein Präfix')?></div>
+            <div><?=!empty($ilias_config['user_prefix']) ? htmlReady($ilias_config['user_prefix']) : _('Kein Präfix')?></div>
         <? else : ?>
-            <input type="text" name="ilias_user_prefix" size="50" maxlength="255" value="<?= htmlReady($ilias_config['user_prefix']) ?>">
+            <input type="text" name="ilias_user_prefix" size="50" maxlength="255" value="<?= empty($ilias_config['user_prefix']) ? '' : htmlReady($ilias_config['user_prefix']) ?>">
         <? endif ?>
     </label>
     <label>
         <span><?= _('Datenfeld (Name) mit Matrikelnummer (nur ausfüllen, wenn die Matrikelnummer in einem Datenfeld gespeichert wird)') ?></span>
-        <input type="text" name="ilias_matriculation" size="50" maxlength="255" value="<?= htmlReady($ilias_config['matriculation']) ?>">
+        <input type="text" name="ilias_matriculation" size="50" maxlength="255" value="<?= empty($ilias_config['matriculation']) ? '' : htmlReady($ilias_config['matriculation']) ?>">
     </label>
     <label>
     <span class="required"><?= _('Struktur für angelegte Kurse') ?></span>
@@ -97,7 +97,7 @@
     <label>
         <? foreach ($modules_available as $module_index => $module_name) : ?>
         <label>
-            <input type="checkbox" name="ilias_modules_<?=$module_index?>" value="1" <?=$ilias_config['modules'][$module_index] ? ' checked':''?>>
+            <input type="checkbox" name="ilias_modules_<?=$module_index?>" value="1" <?=!empty($ilias_config['modules'][$module_index]) ? ' checked':''?>>
             <?=htmlReady($module_name)?>
         </label>
         <? endforeach ?>
diff --git a/app/views/admin/ilias_interface/index.php b/app/views/admin/ilias_interface/index.php
index d786a97..8bee478 100644
--- a/app/views/admin/ilias_interface/index.php
+++ b/app/views/admin/ilias_interface/index.php
@@ -33,7 +33,7 @@
         <? foreach ($ilias_configs as $ilias_index => $ilias_config) : ?>
             <tr id="ilias-<?= htmlReady($ilias_index)?>">
                 <td>
-                    <? if ($ilias_config['is_active']) {
+                    <? if (!empty($ilias_config['is_active'])) {
                         $text = _('Diese ILIAS-Installation ist aktiv. Klicken Sie hier, um sie zu deaktivieren.');
                         $img  = 'checkbox-checked';
                         $cmd  = 'deactivate';
diff --git a/app/views/admin/ilias_interface/soap_methods.php b/app/views/admin/ilias_interface/soap_methods.php
index 1901074..aa84917 100644
--- a/app/views/admin/ilias_interface/soap_methods.php
+++ b/app/views/admin/ilias_interface/soap_methods.php
@@ -9,7 +9,7 @@
  */
 ?>
 <form class="default" action="<?= $controller->url_for('admin/ilias_interface/soap_methods/'.$ilias_index) ?>" method="post">
-    <? if ($result) : ?>
+    <? if (!empty($result)) : ?>
     <article class="studip">
     	<section><?=_('Ergebnis')?></section>
         <? if (is_array($result)) : ?> 
@@ -22,7 +22,7 @@
     </article>
     <? endif ?>
     <?= CSRFProtection::tokenTag() ?>
-    <? if (!$ilias_soap_method) : ?>
+    <? if (empty($ilias_soap_method)) : ?>
     <label>
         <span class="required"><?= _('SOAP-Methode') ?></span>
         <select name="ilias_soap_method">
@@ -36,12 +36,12 @@
         <? foreach ($soap_methods[$ilias_soap_method] as $param) : ?>
         <label>
             <span>  <?= $param ?></span>
-            <input type="text" name="ilias_soap_param_<?=$param?>" size="50" value="<?=$params[$param]?>">
+            <input type="text" name="ilias_soap_param_<?=$param?>" size="50" value="<?=!empty($params[$param]) ? $params[$param] : ''?>">
         </label>
         <? endforeach ?>
     <? endif ?>
     <footer>
-        <? if (!$ilias_soap_method) : ?>
+        <? if (empty($ilias_soap_method)) : ?>
             <?= Studip\Button::createAccept(_('Weiter'), 'submit') ?>
         <? else : ?>
             <?= Studip\Button::createAccept(_('Ausführen'), 'submit') ?>
diff --git a/app/views/course/ilias_interface/add_groups.php b/app/views/course/ilias_interface/add_groups.php
index 495aa5f..2a6bc2f 100644
--- a/app/views/course/ilias_interface/add_groups.php
+++ b/app/views/course/ilias_interface/add_groups.php
@@ -1,6 +1,6 @@
 <form class="default" action="<?= $controller->url_for('course/ilias_interface/add_groups/'.$ilias_index) ?>" method="post">
     <?= CSRFProtection::tokenTag() ?>
-    <? if (!$ilias_index) : ?>
+    <? if (empty($ilias_index)) : ?>
     <label>
         <span class="required"><?= _('ILIAS-Installation auswählen') ?></span>
         <select name="ilias_index" required>
@@ -10,7 +10,6 @@
         <? endforeach ?>
         </select>
     </label>
-    <? elseif ($mode == 'add_groups') : ?>
     <? else : ?>
     <div>
         <input type="hidden" name="cmd" value="create_groups">
@@ -24,8 +23,8 @@
     </div>
     <? endif ?>
     <footer data-dialog-button>
-        <? if ($ilias->isActive() && $submit_text) : ?>
-        <?= Studip\Button::create($submit_text, 'submit', ($dialog && ! $ilias_index) ? ['data-dialog' => 'size=auto'] : []) ?>
+        <? if ($ilias->isActive() && !empty($submit_text)) : ?>
+        <?= Studip\Button::create($submit_text, 'submit', ($dialog && empty($ilias_index)) ? ['data-dialog' => 'size=auto'] : []) ?>
         <? endif ?>
         <?= Studip\Button::createCancel(_('Schließen'), 'cancel', $dialog ? ['data-dialog' => 'close'] : []) ?>
     </footer>
diff --git a/app/views/course/ilias_interface/add_object.php b/app/views/course/ilias_interface/add_object.php
index 8550337..ddb4fed 100644
--- a/app/views/course/ilias_interface/add_object.php
+++ b/app/views/course/ilias_interface/add_object.php
@@ -1,6 +1,6 @@
 <form class="default" action="<?= $controller->url_for('course/ilias_interface/add_object/'.$mode.'/'.$ilias_index) ?>" method="post">
     <?= CSRFProtection::tokenTag() ?>
-<? if (!$ilias_index) : ?>
+<? if (empty($ilias_index)) : ?>
     <label>
         <span class="required"><?= _('ILIAS-Installation auswählen') ?></span>
         <select name="ilias_index" required>
@@ -41,7 +41,7 @@
 <? elseif ($mode === 'assign_own_course') : ?>
     <div>
         <input type="hidden" name="cmd" value="assign_course">
-    <? if ($submit_text) : ?>
+    <? if (!empty($submit_text)) : ?>
         <label>
             <span><?= _('ILIAS-Kurs wählen') ?></span>
             <select name="ilias_course_id" required>
@@ -90,7 +90,7 @@
                     ]) ?>
                 </td>
                 <td>
-                    <a href="<?= $controller->link_for($module->getRoute('view_course'), compact('ilias_search', 'mode')) ?>" <?= $dialog ? 'data-dialog=""' : ''?>>
+                    <a href="<?= $controller->link_for($module->getRoute('view_course'), ['ilias_search' => !empty($ilias_search) ? $ilias_search : '', 'mode' => !empty($mode) ? $mode : '']) ?>" <?= !empty($dialog) ? 'data-dialog=""' : ''?>>
                         <?= htmlReady($module->getTitle()) ?>
                     </a>
                 </td>
@@ -102,7 +102,7 @@
                         Icon::create('info-circle'),
                         [
                             'title'        => _('Info'),
-                            'formaction'   => $controller->url_for($module->getRoute('view_course') .'?ilias_search='.urlencode($ilias_search)),
+                            'formaction'   => $controller->url_for($module->getRoute('view_course') . (!empty($ilias_search) ? '?ilias_search='.urlencode($ilias_search) : '')),
                             'data-dialog'  => ''
                         ]
                     )->condition($edit_permission)->addButton(
@@ -122,8 +122,8 @@
     </table>
     <? endif ?>
     <footer data-dialog-button>
-    <? if ($ilias && $ilias->isActive() && $submit_text) : ?>
-        <?= Studip\Button::create($submit_text, 'submit', ($dialog && $keep_dialog) ? ['data-dialog' => 'size=auto;reload-on-close'] : []) ?>
+    <? if (!empty($ilias) && $ilias->isActive() && !empty($submit_text)) : ?>
+        <?= Studip\Button::create($submit_text, 'submit', ($dialog && !empty($keep_dialog)) ? ['data-dialog' => 'size=auto;reload-on-close'] : []) ?>
     <? endif ?>
         <?= Studip\Button::createCancel(_('Schließen'), 'cancel', $dialog ? ['data-dialog' => 'close'] : []) ?>
     </footer>
diff --git a/app/views/course/ilias_interface/index.php b/app/views/course/ilias_interface/index.php
index 7d33f20..f713580 100644
--- a/app/views/course/ilias_interface/index.php
+++ b/app/views/course/ilias_interface/index.php
@@ -1,7 +1,7 @@
 <form method="post">
-<? foreach($ilias_list as $ilias_index => $ilias) : ?>
-    <? if (!count($ilias->getCourseModules()) && !$courses[$ilias_index] && !$edit_permission) continue; ?>
-    <? if ($anker_target == $ilias_index) : ?>
+<? foreach ($ilias_list as $ilias_index => $ilias) : ?>
+    <? if (!count($ilias->getCourseModules()) && empty($courses[$ilias_index]) && empty($edit_permission)) continue; ?>
+    <? if (!empty($anker_target)  && ($anker_target === $ilias_index)) : ?>
         <a name='anker'></a>
     <? endif?>
     <table class="default">
@@ -80,7 +80,7 @@
                 </td>
         </tr>
         <? endforeach ?>
-    <? elseif (!$courses[$ilias_index]) : ?>
+    <? elseif (empty($courses[$ilias_index])) : ?>
         <tr>
             <td colspan="4">
                 <?= _('Es sind keine Lernobjekte mit dieser Veranstaltung verknüpft.')?>
diff --git a/app/views/course/ilias_interface/view_object.php b/app/views/course/ilias_interface/view_object.php
index 457e07e..d05669d 100644
--- a/app/views/course/ilias_interface/view_object.php
+++ b/app/views/course/ilias_interface/view_object.php
@@ -5,11 +5,11 @@
 	<input type="hidden" name="ilias_ref_id" value="<?=htmlReady($module_id)?>">
     <?= $this->render_partial('my_ilias_accounts/_ilias_module.php') ?>
     <footer data-dialog-button>
-        <? if ($ilias->isActive() && $mode && $edit_permission) : ?>
+        <? if ($ilias->isActive() && !empty($mode) && $edit_permission) : ?>
             <?= Studip\LinkButton::create(_('Zurück'), $controller->url_for('course/ilias_interface/add_object/'.$mode.'/'.$ilias_index.'?ilias_search=' . $ilias_search), $dialog ? ['data-dialog' => 'size=auto'] : []) ?>
             <?= Studip\LinkButton::create(_('Hinzufügen'), $controller->url_for($module->getRoute('add') .'?ilias_search=' . $ilias_search), $dialog ? ['data-dialog' => ''] : []) ?>
         <? endif ?>
-        <? if ($ilias->isActive() && !$mode) : ?>
+        <? if ($ilias->isActive() && empty($mode)) : ?>
             <? if ($edit_permission && $module->isAllowed('delete')) : ?>
                 <?= Studip\LinkButton::create(_('Entfernen'), $controller->url_for($module->getRoute('remove') . '?ilias_search=' . $ilias_search), ['data-confirm' => $module->siblings_count < 2 ? sprintf(_('Dies ist die einzige Instanz des Objekts "%s". Durch das Entfernen aus dem Kurs wird das Objekt unwiderruflich gelöscht! Wollen Sie das Objekt wirklich löschen?'), $module->getTitle()) : sprintf(_('Wollen Sie das Objekt "%s" jetzt entfernen?'), $module->getTitle())]) ?>
             <? endif ?>
diff --git a/lib/ilias_interface/ConnectedIlias.class.php b/lib/ilias_interface/ConnectedIlias.class.php
index 09bc52f..31b9396 100644
--- a/lib/ilias_interface/ConnectedIlias.class.php
+++ b/lib/ilias_interface/ConnectedIlias.class.php
@@ -97,12 +97,9 @@ class ConnectedIlias
         // init current user (only if ILIAS installation is active)
         if ($this->ilias_config['is_active']) {
             $this->user = new IliasUser($this->index, $this->ilias_config['version']);
-            if ($this->user->isConnected()) {
-                $ilias_user_exists = $this->soap_client->lookupUser($this->user->getUsername());
-                if (!$this->soap_client->getError() && !$ilias_user_exists) {
-                    $this->user->unsetConnection(true);
-                }
-            }
+
+            $this->checkIliasUserEntry();
+
             // create account automatically if it doesn't exist
             if (! $this->user->isConnected()) {
                 $this->soap_client->setCachingStatus(false);
@@ -145,7 +142,58 @@ class ConnectedIlias
     {
         $this->ilias_interface_config = Config::get()->ILIAS_INTERFACE_BASIC_SETTINGS;
 
+        $interface_config_options = [
+            'show_course_paths' => true,
+        ];
+
+        foreach ($interface_config_options as $option_key => $option_value) {
+            if (!array_key_exists($option_key, $this->ilias_interface_config)) {
+                $this->ilias_interface_config[$option_key] = $option_value;
+            }
+        }
+
         $ilias_configs = Config::get()->ILIAS_INTERFACE_SETTINGS;
+        $config_options = [
+            'is_active' => false,
+            'name' => '',
+            'version' => '',
+            'url' => '',
+            'client' => '',
+            'ldap_enable' => '',
+            'no_account_updates' => false,
+            'admin' => 'ilias_soap_admin',
+            'admin_pw' => '',
+            'http_connection_timeout' => 30,
+            'http_request_timeout' => 30,
+
+            'root_category_name' => '',
+            'root_category' => '',
+            'user_prefix' => 'studip_',
+            'delete_ilias_users' => '',
+            'delete_ilias_courses' => '',
+            'reconnect_accounts' => false,
+            'user_data_category' => '',
+            'matriculation' => '',
+            'discipline_1' => ['id' => ''],
+            'discipline_2' => ['id' => ''],
+            'allow_change_account' => false,
+            'category_create_on_add_module' => false,
+            'category_to_desktop' => false,
+            'cat_semester' => '',
+            'course_semester' => '',
+            'course_veranstaltungsnummer' => false,
+            'modules' => [],
+
+            'author_role_name' => '',
+            'author_role' => '',
+            'author_perm' => ''
+        ];
+        foreach ($config_options as $option_key => $option_value) {
+            if (!array_key_exists($option_key, $ilias_configs[$this->index])) {
+                $ilias_configs[$this->index][$option_key] = $option_value;
+            }
+        }
+
         $this->ilias_config = $ilias_configs[$this->index];
     }
 
@@ -760,17 +808,12 @@ class ConnectedIlias
             foreach ($this->ilias_config['modules'] as $type => $name) {
                 $types[] = $type;
             }
-            $result = $this->soap_client->getTreeChilds($parent_id, $types);
-            $user_result = $this->soap_client->getTreeChilds($parent_id, $types, $this->user->getId());
-
+            $result = $this->soap_client->getTreeChilds($parent_id, $types, $this->user->getId());
             if ($result) {
                 foreach($result as $ref_id => $data) {
                     if ($data['type'] == 'fold') {
                         unset($result[$ref_id]);
                         $result = $result + $this->getChilds($ref_id);
-                    } else {
-                        $result[$ref_id]['accessInfo'] = $user_result[$ref_id]['accessInfo'];
-                        $result[$ref_id]['references'][$ref_id] = $user_result[$ref_id]['references'][$ref_id];
                     }
                 }
             }
@@ -1097,29 +1140,51 @@ class ConnectedIlias
         return null;
     }
 
+
     /**
-     * check user
+     * check Ilias user entry 
      *
-     * checks if ILIAS user exists, creates new user if not
+     * checks if ILIAS user exists and removes auth_extern entry otherwise
      * @access public
      * @return boolean returns user status
      */
-    public function checkUser()
+    public function checkIliasUserEntry()
     {
-        if ($this->user->getId()) {
-            $user_exists = $this->soap_client->getUser($this->user->getId());
-            if (!is_array($user_exists)) {
+        if ($this->user->isConnected()) {
+            $ilias_user_id = $this->soap_client->lookupUser($this->user->getUsername());
+            $ilias_user_exists = $this->soap_client->getUser($this->user->getId());
+            if (!$this->soap_client->getError() && empty($ilias_user_id) && ! is_array($ilias_user_exists)) {
+                $this->soap_client->setCachingStatus(false);
+                $this->soap_client->clearCache();
+                $user_id = $this->soap_client->lookupUser($this->user->getUsername());
+                $user_exists = $this->soap_client->getUser($this->user->getId());
                 $admin_user_id = $this->soap_client->lookupUser($this->ilias_config['admin']);
                 $admin_user_exists = $this->soap_client->getUser($admin_user_id);
-                if (is_array($admin_user_exists)) {
+                if (is_array($admin_user_exists) && empty($user_id) && ! is_array($user_exists)) {
                     $this->user->unsetConnection(true);
-                    if ($this->newUser()) {
-                        PageLayout::postSuccess(_("Neue Verknüpfung zu ILIAS-User angelegt."));
-                    }
+                    return false;
                 }
-            } else return true;
+            }
         }
-        return false;
+        return true;
+    }
+
+    /**
+     * check user
+     *
+     * checks if ILIAS user exists, creates new user if not
+     * @access public
+     * @return boolean returns user status
+     */
+    public function checkUser()
+    {
+        if (! $this->checkIliasUserEntry()) {
+            if ($this->newUser()) {
+                PageLayout::postSuccess(_("Neue Verknüpfung zu ILIAS-User angelegt."));
+            }
+            return false;
+        }
+        return true;
     }
 
     /**
@@ -1184,7 +1249,6 @@ class ConnectedIlias
                     $member_data["role"] = self::CRS_MEMBER_ROLE;
                     $type = "Member";
                     break;
-                default:
             }
             $member_data["passed"] = self::CRS_PASSED_VALUE;
             if ($type != "") {
@@ -1231,7 +1295,7 @@ class ConnectedIlias
         }
 
         $view_permission = false;
-        if ((in_array($this->operations[self::OPERATION_READ], $this->tree_allowed_operations)) && (in_array($this->operations[self::OPERATION_VISIBLE], $this->tree_allowed_operations))) {
+        if ((in_array($this->getOperation(self::OPERATION_READ), $this->tree_allowed_operations)) && (in_array($this->getOperation(self::OPERATION_VISIBLE), $this->tree_allowed_operations))) {
             $view_permission = true;
         }
         return $view_permission;
diff --git a/lib/ilias_interface/IliasModule.class.php b/lib/ilias_interface/IliasModule.class.php
index f9bf958..d3ec88c 100644
--- a/lib/ilias_interface/IliasModule.class.php
+++ b/lib/ilias_interface/IliasModule.class.php
@@ -54,10 +54,14 @@ class IliasModule
         $this->make_date = $module_data['create_date'];
         $this->change_date = $module_data['last_update'];
         $supported_modules = ConnectedIlias::getSupportedModuleTypes();
-        $this->module_type_name = $supported_modules[$this->module_type];
+        if (!empty($supported_modules[$this->module_type])) {
+            $this->module_type_name = $supported_modules[$this->module_type];
+        } else {
+            $this->module_type_name = $this->module_type;
+        }
         $this->owner = $module_data['owner'];
         $this->author_studip = false;
-        if (is_array($module_data['references'][$module_id]['operations'])) {
+        if (!empty($module_data['references'][$module_id]['operations']) && is_array($module_data['references'][$module_id]['operations'])) {
             $this->allowed_operations = $module_data['references'][$module_id]['operations'];
         } else {
             $this->allowed_operations = [];
diff --git a/lib/ilias_interface/IliasSoap.class.php b/lib/ilias_interface/IliasSoap.class.php
index 9ae6f85..ed0e21d 100644
--- a/lib/ilias_interface/IliasSoap.class.php
+++ b/lib/ilias_interface/IliasSoap.class.php
@@ -132,6 +132,7 @@ class IliasSoap extends StudipSoapClient
         }
 
         $cache_index = md5($method . ':' . json_encode($params));
+
         if ($this->caching_active && isset($this->soap_cache[$cache_index]) && $method !== 'login') {
             $result = $this->soap_cache[$cache_index];
         } else {
@@ -364,7 +365,7 @@ class IliasSoap extends StudipSoapClient
                         $single_object['references'][(string)$reference[0]['ref_id']]['path_types'][] = (string)$element[0]['type'];
                     }
                 }
-                if ($single_object['ref_id']) {
+                if (!empty($single_object['ref_id'])) {
                     $objects[$single_object['ref_id']] = $single_object;
                 } elseif (!$condition_field) {
                     $objects[] = $single_object;
@@ -393,7 +394,7 @@ class IliasSoap extends StudipSoapClient
             'types' => $types,
             'key' => $key,
             'combination' => $combination,
-            'user_id' => (int)$user_id
+            'user_id' => !empty($user_id) ? (int)$user_id : null
             ];
 
         $result = $this->call('searchObjects', $param);
@@ -414,12 +415,12 @@ class IliasSoap extends StudipSoapClient
     * @param string user_id ilias-user-id
     * @return array object
     */
-    function getObjectByReference($ref, $user_id = "")
+    function getObjectByReference($ref, $user_id = false)
     {
         $param = [
             'sid' => $this->getSID(),
             'reference_id' => $ref,
-            'user_id' => (int)$user_id
+            'user_id' => !empty($user_id) ? (int)$user_id : null
             ];
 
         $result = $this->call('getObjectByReference', $param);
@@ -446,13 +447,12 @@ class IliasSoap extends StudipSoapClient
         $param = [
             'sid'   => $this->getSID(),
             'title' => $key,
-            'user_id' => 0
+            'user_id' => null
         ];
         $result = $this->call('getObjectsByTitle', $param);
         if ($result != false)
         {
             $objects = $this->parseIliasObject($result);
-            //$objects = $this->parseXML($result);
             foreach($objects as $index => $object_data)
             {
                 if (($type != "") AND ($object_data["type"] != $type))
@@ -481,7 +481,7 @@ class IliasSoap extends StudipSoapClient
         $param = [
             'sid'   => $this->getSID(),
             'title' => $key,
-            'user_id' => 0
+            'user_id' => null
         ];
         $result = $this->call('getObjectsByTitle', $param);
 
@@ -500,7 +500,6 @@ class IliasSoap extends StudipSoapClient
                     if (sizeof($object_data["references"]) > 0)
                     {
                         return key($object_data["references"]);
-                        //return $object_data["references"][0]["ref_id"];
                     }
         }
         return false;
@@ -607,14 +606,12 @@ class IliasSoap extends StudipSoapClient
     * @param string user_id user-id for permissions
     * @return array objects
     */
-    function getTreeChilds($ref_id, $types = "", $user_id = "")
+    function getTreeChilds($ref_id, $types, $user_id)
     {
-        if ($types == "")
-            $types = [];
         $param = [
             'sid' => $this->getSID(),
-            'ref_id' => $ref_id,
-            'types' => $types,
+            'ref_id' => (int)$ref_id,
+            'types' => (array)$types,
             'user_id' => (int)$user_id
             ];
 
@@ -692,8 +689,7 @@ class IliasSoap extends StudipSoapClient
         $result = $this->call('getUserRoles', $param);
         if ($result != false)
         {
-            // TODO: change to simple xml
-            $objects = $this->parseXML($result);
+            $objects = $this->parseIliasObject($result);
             $roles = [];
             foreach ($objects as $count => $role)
                 $roles[$count] = $role["obj_id"];
@@ -719,8 +715,7 @@ class IliasSoap extends StudipSoapClient
         $result = $this->call('getLocalRoles', $param);
         if ($result != false)
         {
-            // TODO: change to simple xml
-            $objects = $this->parseXML($result);
+            $objects = $this->parseIliasObject($result);
             return $objects;
         }
         return false;
@@ -744,13 +739,10 @@ class IliasSoap extends StudipSoapClient
 
         $xml = "<!DOCTYPE Objects SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_object_0_1.dtd\">
 <Objects>
-  <Object type=\"$type\" obj_id=\"\">
-    <Title>
-    $title
-    </Title>
-    <Description>
-    $description
-    </Description>
+  <Object type=\"$type\" obj_id=\"\" offline=\"\">
+    <Title>$title</Title>
+    <Description>$description</Description>
+    <ImportId></ImportId>
   </Object>
 </Objects>";
 
@@ -785,13 +777,10 @@ class IliasSoap extends StudipSoapClient
 
         $xml = "<!DOCTYPE Objects SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_object_0_1.dtd\">
 <Objects>
-  <Object type=\"$type\" obj_id=\"\">
-    <Title>
-    $title
-    </Title>
-    <Description>
-    $description
-    </Description>
+  <Object type=\"$type\" obj_id=\"\" offline=\"\">
+    <Title>$title</Title>
+    <Description>$description</Description>
+    <ImportId></ImportId>
   </Object>
 </Objects>";
 
@@ -991,13 +980,12 @@ class IliasSoap extends StudipSoapClient
             $param = [
                             'sid' => $this->getSID(),
                             'user_ids' => [$user_id],
-                            'attach_roles' => 0
+                            'attach_roles' => null
             ];
             $result = $this->call('getUserXML', $param);
             if ($result != false)
             {
-                // TODO: change to simple xml
-                $objects = $this->parseXML($result);
+                $objects = $this->parseIliasObject($result);
                 $all_objects = [];
                 foreach($objects as $count => $object_data){
                     if (is_array($object_data["references"]))
@@ -1640,12 +1628,14 @@ class IliasSoap extends StudipSoapClient
             $s = simplexml_load_string($result);
             foreach ($s->rows->row as $row) {
                 $ref_id = (string)$row->column[0];
-                $xml = $this->parseXML((string)$row->column[1]);
-                $course = array_pop($xml);
-                $ret[$ref_id] = $course['title'];
+                $s2 = simplexml_load_string((string)$row->column[1]);
+
+                if (is_object($s2->MetaData)) {
+                    $ret[$ref_id] = trim($s2->MetaData->General->Title);
+                }
             }
         }
-        if (is_array($ret)) {
+        if (!empty($ret)) {
             return $ret;
         } else {
             return false;
@@ -1666,19 +1656,18 @@ class IliasSoap extends StudipSoapClient
         $param = [
             'sid'          => $this->getSID(),
             'reference_id' => $id,
-            'user_id'      => 0
+            'user_id'      => null
         ];
 
         $result = $this->call('getObjectByReference', $param);
         if ($result != false)
         {
-            // TODO: change to simple xml
-            $objects = $this->parseXML($result);
+            $objects = $this->parseIliasObject($result);
             if(is_array($objects)){
                 foreach($objects as $index => $object_data){
                     if(is_array($object_data['references'])){
-                        foreach($object_data['references'] as $reference){
-                            if($reference['ref_id'] == $id && $reference['accessInfo'] != 'object_deleted') return $object_data['obj_id'];
+                        foreach($object_data['references'] as $ref_id => $reference){
+                            if($ref_id == $id && $reference['accessInfo'] != 'object_deleted') return $object_data['obj_id'];
                         }
                     }
                 }
diff --git a/lib/ilias_interface/studip_referrer_9x.php b/lib/ilias_interface/studip_referrer_9x.php
new file mode 100644
index 0000000..8cfad26
--- /dev/null
+++ b/lib/ilias_interface/studip_referrer_9x.php
@@ -0,0 +1,125 @@
+<?php
+/* Copyright (c) 1998-2014 ILIAS open source, Extended GPL, see docs/LICENSE */
+
+/**
+* redirect script for studip-users
+*
+* @author Arne Schroeder <schroeder@data-quest.de>
+* @author Andre Noack <noack@data-quest.de>
+*
+*/
+
+/* ILIAS Version 9.x */
+
+if (file_exists("./ilias.ini.php")) {
+    require_once("./Services/Init/classes/class.ilIniFile.php");
+    $ilIliasIniFile = new ilIniFile("./ilias.ini.php");
+    $ilIliasIniFile->read();
+    $serverSettings = $ilIliasIniFile->readGroup("server");
+    if (isset($serverSettings["studip"]) && $serverSettings["studip"] != 1) {
+        echo 'Option "studip" in ilias.ini.php is not enabled. You need to add studip = "1" to the server section.';
+        exit();
+    }
+
+    $cookie_path = dirname($_SERVER['PHP_SELF']);
+    if (substr($cookie_path,-1) != "/") {
+        $cookie_path .= "/";
+    }
+    if (isset($_GET['sess_id'])) {
+        setcookie('PHPSESSID',$_GET['sess_id'],0, $cookie_path);
+        $_COOKIE['PHPSESSID'] = $_GET['sess_id'];
+    }
+
+    if (isset($_GET['client_id'])) {
+        setcookie('ilClientId',$_GET['client_id'],0, $cookie_path);
+        $_COOKIE['ilClientId'] = $_GET['client_id'];
+    }
+
+    require_once "./include/inc.header.php";
+
+    $base_url= "ilias.php?baseClass=ilDashboardGUI";
+
+
+    // redirect to specified page
+    $redirect = false;
+    switch($_GET['target']) {
+    case 'start':
+        switch($_GET['type']) {
+        case 'lm':
+            $base_url = "ilias.php?baseClass=ilLMPresentationGUI";
+            break;
+        case 'tst':
+            $base_url = "ilias.php?cmd=infoScreen&cmdClass=ilobjtestgui&baseClass=ilRepositoryGUI";
+            break;
+        case 'svy':
+            $base_url = "ilias.php?cmd=infoScreen&cmdClass=ilObjSurveyGUI&baseClass=ilRepositoryGUI";
+            break;
+        case 'exc':
+            $base_url = "ilias.php?cmd=infoScreen&cmdClass=ilExerciseHandlerGUI&baseClass=ilRepositoryGUI";
+            break;
+        case 'sahs':
+            $base_url = "ilias.php?baseClass=ilSAHSPresentationGUI";
+            break;
+        case 'htlm':
+            $base_url = "ilias.php?baseClass=ilHTLMPresentationGUI";
+            break;
+        case 'glo':
+            $base_url = "ilias.php?baseClass=ilGlossaryPresentationGUI";
+            break;
+        case 'cat':
+        case 'crs':
+            $base_url = "ilias.php?cmd=view&cmdClass=ilobjcoursegui&baseClass=ilRepositoryGUI";
+            break;
+        case 'webr':
+            $base_url = "ilias.php?cmd=calldirectlink&baseClass=ilLinkResourceHandlerGUI";
+            break;
+        }
+        break;
+    case 'new':
+        $base_url = "ilias.php?baseClass=ilRepositoryGUI&cmd=create&new_type=".preg_replace('/[^a-z]/', '', $_GET['type']);
+        break;
+    case 'edit':
+        switch($_GET['type'])
+        {
+        case 'lm':
+            $base_url = "ilias.php?baseClass=ilLMEditorGUI";
+            break;
+        case 'tst':
+            $base_url = "ilias.php?baseClass=ilObjTestGUI";
+            break;
+        case 'sahs':
+            $base_url = "ilias.php?baseClass=ilSAHSEditGUI";
+            break;
+        case 'htlm':
+            $base_url = "ilias.php?baseClass=ilHTLMEditorGUI";
+            break;
+        case 'glo':
+            $base_url = "ilias.php?baseClass=ilGlossaryEditorGUI";
+            break;
+        case 'svy':
+            $base_url = "ilias.php?baseClass=ilObjSurveyGUI";
+            break;
+        case 'exc':
+            $base_url = "ilias.php?baseClass=ilExerciseHandlerGUI";
+            break;
+        case 'crs':
+            $base_url = "ilias.php?baseClass=ilrepositorygui&cmd=edit";
+            break;
+        case 'webr':
+            $base_url = "ilias.php?baseClass=ilLinkResourceHandlerGUI";
+            break;
+        }
+        break;
+    }
+    if ($base_url)
+    {
+        if (!empty($_GET['ref_id'])) {
+            $base_url .= "&ref_id=".(int)$_GET['ref_id'];
+        }
+        $token_repository = new ilCtrlTokenRepository();
+        $token = $token_repository->getToken();
+        $base_url .= '&' . ilCtrlInterface::PARAM_CSRF_TOKEN . '=' . $token->getToken();
+        header("Location: " . $base_url);
+        exit();
+    }
+}
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 17ff7c6..6a6a6d8 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -18,6 +18,7 @@ parameters:
         - lib/classes/ZipArchiveLegacyTrait.php
         - lib/elearning/studip_referrer.php
         - lib/soap/StudipSoapClient_PHP5.class.php
+        - lib/ilias_interface/studip_referrer_9x.php
     tmpDir: .caches
     earlyTerminatingMethodCalls:
         RESTAPI\RouteMap: